Excessive intake of vitamin C will also have some negative effects on the body. A new study shows that taking vitamin C pills may aggravate arteriosclerosis. Dwyer of the American Heart Association and others examined 573 middle-aged men and women who looked healthy, and 30% of them often took various vitamin C pills. Although the survey found that there is no obvious evidence that taking a lot of vitamin C from food or taking multivitamin tablets every day is really harmful to health. But those who take vitamin C pills will quickly thicken the aortic wall of the neck. If you take more vitamin C tablets, it will get thicker faster.

The survey found that if you take 500 mg of vitamin C every day for at least one year, your chances of developing carotid atherosclerosis are one and a half times higher than those who avoid taking any supplements. If you are a smoker, you are five times more likely to have carotid atherosclerosis than those who don't take any supplements. In addition, the Breier research team of Cancer Pharmacology Center of the University of Pennsylvania in the United States pointed out in the latest issue of Science that vitamin C used to be considered as an antioxidant that can protect DNA, but they confirmed that it can also induce some components, which exist in various tumors. Buhrer said that their experimental results are aimed at explaining that vitamin C has no anticancer function.

In clinical trials, although it has been firmly believed that vitamin C can prevent and even cure cancer, Breier believes that its carcinogenic suspicion is no less than its medical function. Because fruits, vegetables and cereals rich in vitamin C have anti-cancer function, some people infer that vitamin C can also prevent cancer. Buhrer pointed out that cancer can be prevented because there is a complete diet of fruits and vegetables, but it cannot be inferred that purified vitamin C has the same effect. Not only is excessive intake of vitamin C harmful, but too much intake of other vitamins is also harmful and even toxic.

In short, as long as people pay attention to a balanced diet, they don't need to take vitamin supplements. If they need to take medicine, they should strictly follow the doctor's advice.